Method of producing a new ceramic mass and of manufacturing pottery.



UNITED, STATES PATENT OFFICE.

HERMANN EISENLOHR, OF KARLSRUHE,-GERMANY.

METHOD OF PRODUCING A NEW CERAMIC MASS AND OF MANUFACTURING POTTERY.

Specification of Letters Patent.

Patented Oct. 20, 1908,

Application filed June '1, 1906. Serial No. 320,651.

To all whom it may concern:

Be it known that I, HERMANN EISENLOHR, residing at 21 Victoria street, in the city of Karlsruhe, Germany, have invented newand useful Improvements in Methods of Producing a New Ceramic Mass and of Manufacturing Potteryoi All Kinds Therefrom, of which the followirg is a specification.

The present inention relates tothe production of a newceramic mass and to the production therefrom of vessels, which can sustain sudden and rapid changes of temperature.

Though natural and artificial aluminium oxid have been employed in making ceramic ware or pottery which is to withstand rapid changes of temperature, the resent inven-. tion which is directed to a similar object, depends on the perfectly new observation, that sintered porcelain-like vessels may be made from a mixtureof plastic and non-plastic clay (that is clay from which the plasticity has been removed by burning) or quartz wit a hard glass of high silica content which is made easily with absolute uniformity of a certain composition. The were made from this mass is characterized not only by its resistance to rapid changes of temperature but also by otherv important technical Properties I and by satisfactory outward appearance.

The new ceramic mass consists of about one half of clay of any suitable kind and about one half of a hard glass of a high silicacontent, which is composed only of x 3t'asilica, as main. constituent, alumina, alkalies lated hard-glass with non-plastic c ay or s ,witl i quartz. To this mixture plastic clay as a binding material is added and vessels are utilization of'the kiln, less breakage and im portant saving. of fuel. By this low burning tem erature also ware which may be more easi y decorated than porcelain, is obtained. Owing to this latter property the new mass isespecially adapted forthe manufacture of vessels for the household, the product being very transparent and though burned at a low temperature, very hard. 7

T e new mass 1s es eciallysuitable for the manufacture of artic es subjected to sudden changes of temperature and in addition to.

this insensibility against alkalies and acids at higher tern eratures offers, together with the fact that it is not materially aifec-ted by changes of temperature, the chance that the mass may also be advanta eously'used for the manufacture of vessels f or chemical pur poses; Y What I claim is:" I The herein described method of manufacturing pottery consisting-in mixing granu- HERMANN EIS ENIlOHR. Witnesses:

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have hereunto.

.lated glass, having a content of at least the. desired vessels from 7 

